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23 Cards in this Set
- Front
- Back
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Formation of the neural groove from the neural plate occurs at how many days of development?
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18
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Formation of the neural groove is induced by what?
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The notochord
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Closing of the neural tube occurs in what direction?
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Rostral --> caudal
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Failure to close the neural tube at the rostral end results in _________; failure to close the neural tube at the caudal end results in ______________.
What nutrient is important in avoiding these birth defects? |
-rostral - anencephaly
-caudal - spina bifida (or less severely, myelomeningecele) -folic acid |
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____________ cells later go on to form Schwann cells, melanocytes, and dorsal root ganglia.
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Neural crest cells
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Name the three primitive brain divisions.
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-prosencephalon
-mesencephalon -rhombencephalon |
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Name the vesicles that arise from the prosencephalon.
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prosencephalon --> telencephalon, diencephalon
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Name the vesicles that arise from the mesencephalon
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mesencephalon --> mesencephalon
(stays the same) |
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Name the vesicles that arise from the rhombencephalon.
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rhombencephalon --> metencephalon, myelencephalon
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Name the two flexures that arise as the brain develops and where they occur.
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cephalic flexure - mesencephalon
cervical flexure - between the rhombencephalon and the spinal cord |
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The most rostral portion of the telencephalon, which persists as the most rostral portion of the ventricular system in the adult, is the __________________.
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lamina terminalis
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The ______________ will develop into the cerebral hemispheres and lateral ventricles.
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Telencephalon
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T/F In the adult, the ventricular system in the brain is associated with the ventricular system of the spinal cord.
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False - the hollow ventricular system in the spinal cord closes and becomes the central canal (not filled with CSF)
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The third ventricle develops from what vesicle?
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Diencephalon
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The pons develops from what vesicle?
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Metencephalon
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The medulla and cranial nerves 8-12 arise from what vesicle?
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Myelencephalon
-also central canal |
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The cerebral aqueduct develops from what vesicle?
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Mesencephalon
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The thalamus and its associated structures (hypothalamus, etc.) develop from what vesicle?
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Diencephalon
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The fourth ventricle and cerebellum develop from what vesicle?
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Metencephalon
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The sulcus limitans is a groove along the walls of the ventricular system that divides the cranial nerves into _________ and _________ nuclei.
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Sensory (Alar) and Motor (Basal)
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At the third ventricle, the sulcus limitans is also called what?
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Hypothalamic sulcus (divides thalamus from hypothalamus)
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What kind of section is this?
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Coronal
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What kind of section is this?
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Horizontal
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